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一、海西州的地震形势 青海省是我国地震多发省份,海西州又是全省地震多发地区之一。海西州地处青藏构造块体北部边缘地区,受欧亚板块、太平洋板块及印度板块的挤压,境内构造活动十分强烈,规模不等的活动断裂纵横交错,几乎遍布全境。经考查,历史上曾发生多次7级以上大震。本世纪末到下世纪初,我国大陆进入第五个地震活跃期,青藏构造块体及其边缘地区将是地震活动主体地区之一,海西州的地震活动将日益增强。
First, the earthquake situation in Hercynian Qinghai Province is China’s earthquake-prone provinces, the Haixi is one of the province’s earthquake-prone areas. Hercynian is located in the northern margin of the Qinghai-Tibet Block. Extruded by the Eurasian Plate, the Pacific Plate and the Indian Plate, Hercynian has a very strong tectonic activity in China. Hercynian faults of various sizes are criss-crossing in almost all directions. After examination, history has occurred more than seven earthquakes. From the end of this century to the beginning of the next century, the mainland of China has entered the fifth active phase of the earthquake. The Qinghai-Tibet block and its periphery will be one of the main areas of seismic activity, and the seismic activity in the Hercynian state will increasingly increase.